weekly(deps-dev): bump typescript in /examples/typescript

Bumps [typescript](https://github.com/Microsoft/TypeScript) from 3.9.7 to 4.0.2.
- [Release notes](https://github.com/Microsoft/TypeScript/releases)
- [Commits](microsoft/TypeScript@v3.9.7...v4.0.2)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Author: dependabot-preview[bot]

examples/typescript/package-lock.json

@@ -8,6 +8,6 @@
     "cypress-rollup-preprocessor": "file:../..",
     "rollup": "^2.26.5",
     "rollup-plugin-typescript2": "^0.27.2",
-    "typescript": "^3.9.7"
+    "typescript": "^4.0.2"
   }
 }